I have an app called IPieta with a lot of great Catholic sources, (free app) including the Catechism of Thomas Aquinas. Under the section on Baptism it says:
ERRORS CONCERNING BAPTISM
There have been certain errors concerning this Sacrament. The first was that of the Solentiani, who received a baptism not of water but of the spirit. Against them the Lord says: “Unless a man be born again of water and the Holy Spirit, he cannot enter into the kingdom of God.”[15]